<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../vue.js"></script>
</head>

<body>
  <div id="app">
    <form action="###">
      <!-- 
        单选框无论个数多少,都是单选,所以data中只需要用一个字符串类型保存当前的value值即可
      -->

      <input type="radio" name="sex" value="大理" v-model = "city">大理
      <input type="radio" name="sex" value="稻城" v-model = "city">稻城
      <input type="radio" name="sex" value="拉萨" v-model = "city">拉萨
      
    </form>
  </div>
  <script>
    Vue.config.productionTip = false;

    const vm = new Vue({
      el: "#app",
      data() {
        return {
          //单选框用字符串
          city: ""
        }
      }
    })
  </script>
</body>

</html>